Configuring Apache Solr 4.x for Drupal, with password authentication
Most of high traffic or complex Drupal sites use Apache Solr as the search engine. It is much faster and more scaleable than Drupal's search module.
In this article, we describe one way of many for having a working Apache Solr installation for use with Drupal 7.x, on Ubunutu Server 12.04 LTS.
For this article, we focus on having an installation of Apache Solr with the following objectives: